This KB describes how you can solve the issue when getting the"Recalibration error" message in the Proof Server log.
Check and Recalibration chart is not printed.
Check if the white calibration tile is correctly installed
Check if the correct media is selected in the Proof Server output device. If possible select "20 inch (SpectroProofer)" or "24 inch (SpectroProofer)"
In the proof server log, if you see the following message: "EpsonPrint:Error sending print data" AND if the printer is also configured in a GMG proof system then shut down the GMG software so that the Proof Server can make a connection with the SpectroProofer.
Verify if the SpectroProofer is functioning correctly by following the steps in this KB: